Marker for petroleum fuels
AssigneeMorton-Norwich Products, Inc.
InventorRichard B. Orelup
Life of this patent
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Abstract
New markers for petroleum fuels; a method of marking said fuels with a marker and of subsequently detecting the presence of said marker; and marked fuels are provided. The markers include the following compounds: ##STR1## 1-(4-morpholino)-3-(alpha naphthylamino)-propane, ##STR2## 1-(4-morpholino)-3-(beta naphthylamino)-propane, ##STR3## where R.sub.1 and R.sub.2 may be hydrogen or alkyl having from one to twenty carbon atoms. The marker is detected in said marked fuel by (1) extraction with an acidic aqueous solution and (2) admixture with a stabilized solution of diazotized 2-chlor-4-nitroaniline to yield a color characteristic of the marker.
Claims31
A marker for petroleum fuels, said marker being selected from the group consisting of:
- ##STR7## 1-(4-morpholino)-3-(alpha naphthaylamino)-propane, ##STR8## 1-(4-morpholino)-3-(beta naphthylamino)-propane, ##STR9## where R.sub.1 and R.sub.2 may each be hydrogen or alkyl having from one to twenty carbon atoms.
A method of marking a petroleum fuel with a marker, said method comprising dissolving in said fuel at least about 0.5 part per million of a marker selected from the group consisting of:
- ##STR16## 1-(4-morpholino)-3-(alpha naphthylamino)-propane, ##STR17## 1-(4-morpholino)-3-(beta naphthylamino)-propane, ##STR18## where R.sub.1 and R.sub.2 may each be hydrogen or alkyl having from one to twenty carbon atoms.
A method of detecting the presence in a petroleum fuel of at least about 0.5 part per million of a marker selected from the group consisting of ##STR20## 1-(4-morpholino)-3-(alpha naphthylamino)-propane, ##STR21## 1-(4-morpholino)-3-(beta naphthylamino)-propane, ##STR22## where R.sub.1 and R.sub.2 may each be hydrogen or alkyl having from one to twenty carbon atoms, said method comprising (I) extracting said marker from said marked fuel with an aqueous acidic extractant and (II) admixing with the aqueous acidic extract so obtained a solution of diazotized 2-chlor-4-nitroaniline whereupon a characteristic coloration is obtained.
A marked petroleum fuel having dissolved therein at least 0.5 part per million of a marker selected from the group consisting of ##STR24## 1-(4-morpholino)-3-(alpha naphthylamino)-propane, ##STR25## 1-(4-morpholino)-3-(beta naphthylamino)-propane, ##STR26## where R.sub.1 and R.sub.2 may each be hydrogen or alkyl having from one to twenty carbon atoms.
Dependencies are inferred from the claim text.